A354408 - cp's OEIS frontend

A354408 Triangle read by rows of generalized ménage numbers: T(n,k) is the number of permutations pi in S_n such that pi(i) != i and pi(i) != i+k (mod n) for all i; n, 1 <= k < n.

n	a(n)
2	0
3	1
4	1
5	2
6	4
7	2
8	13
9	13
10	13
11	13
12	80
13	82
14	80
15	82
16	80
17	579
18	579
19	579
20	579
21	579
22	579
23	4738
24	4740
25	4738
26	4752
27	4738
28	4740
29	4738
30	43387
31	43387
32	43390
33	43387
34	43387
35	43390
36	43387
37	43387
38	439792
39	439794
40	439792
41	439794
42	440192
43	439794
44	439792
45	439794
46	439792

[0, 1, 1, 2, 4, 2, 13, 13, 13, 13, 80, 82, 80, 82, 80, 579, 579, 579, 579, 579, 579, 4738, 4740, 4738, 4752, 4738, 4740, 4738, 43387, 43387, 43390, 43387, 43387, 43390, 43387, 43387, 439792, 439794, 439792, 439794, 440192, 439794, 439792, 439794, 439792]

cp's OEIS Frontend

A354408 Triangle read by rows of generalized ménage numbers: T(n,k) is the number of permutations pi in S_n such that pi(i) != i and pi(i) != i+k (mod n) for all i; n, 1 <= k < n.

Table of values

List of values